1238 static int check_gamma(struct drm_intel_overlay_attrs *attrs)  in check_gamma()  argument
1240 	if (!check_gamma_bounds(0, attrs->gamma0) ||  in check_gamma()
1241 	    !check_gamma_bounds(attrs->gamma0, attrs->gamma1) ||  in check_gamma()
1242 	    !check_gamma_bounds(attrs->gamma1, attrs->gamma2) ||  in check_gamma()
1243 	    !check_gamma_bounds(attrs->gamma2, attrs->gamma3) ||  in check_gamma()
1244 	    !check_gamma_bounds(attrs->gamma3, attrs->gamma4) ||  in check_gamma()
1245 	    !check_gamma_bounds(attrs->gamma4, attrs->gamma5) ||  in check_gamma()
1246 	    !check_gamma_bounds(attrs->gamma5, 0x00ffffff))  in check_gamma()
1249 	if (!check_gamma5_errata(attrs->gamma5))  in check_gamma()
1258 	struct drm_intel_overlay_attrs *attrs = data;  in intel_overlay_attrs()  local
1274 	if (!(attrs->flags & I915_OVERLAY_UPDATE_ATTRS)) {  in intel_overlay_attrs()
1275 		attrs->color_key  = overlay->color_key;  in intel_overlay_attrs()
1276 		attrs->brightness = overlay->brightness;  in intel_overlay_attrs()
1277 		attrs->contrast   = overlay->contrast;  in intel_overlay_attrs()
1278 		attrs->saturation = overlay->saturation;  in intel_overlay_attrs()
1281 			attrs->gamma0 = I915_READ(OGAMC0);  in intel_overlay_attrs()
1282 			attrs->gamma1 = I915_READ(OGAMC1);  in intel_overlay_attrs()
1283 			attrs->gamma2 = I915_READ(OGAMC2);  in intel_overlay_attrs()
1284 			attrs->gamma3 = I915_READ(OGAMC3);  in intel_overlay_attrs()
1285 			attrs->gamma4 = I915_READ(OGAMC4);  in intel_overlay_attrs()
1286 			attrs->gamma5 = I915_READ(OGAMC5);  in intel_overlay_attrs()
1289 		if (attrs->brightness < -128 || attrs->brightness > 127)  in intel_overlay_attrs()
1291 		if (attrs->contrast > 255)  in intel_overlay_attrs()
1293 		if (attrs->saturation > 1023)  in intel_overlay_attrs()
1296 		overlay->color_key  = attrs->color_key;  in intel_overlay_attrs()
1297 		overlay->brightness = attrs->brightness;  in intel_overlay_attrs()
1298 		overlay->contrast   = attrs->contrast;  in intel_overlay_attrs()
1299 		overlay->saturation = attrs->saturation;  in intel_overlay_attrs()
1311 		if (attrs->flags & I915_OVERLAY_UPDATE_GAMMA) {  in intel_overlay_attrs()
1320 			ret = check_gamma(attrs);  in intel_overlay_attrs()
1324 			I915_WRITE(OGAMC0, attrs->gamma0);  in intel_overlay_attrs()
1325 			I915_WRITE(OGAMC1, attrs->gamma1);  in intel_overlay_attrs()
1326 			I915_WRITE(OGAMC2, attrs->gamma2);  in intel_overlay_attrs()
1327 			I915_WRITE(OGAMC3, attrs->gamma3);  in intel_overlay_attrs()
1328 			I915_WRITE(OGAMC4, attrs->gamma4);  in intel_overlay_attrs()
1329 			I915_WRITE(OGAMC5, attrs->gamma5);  in intel_overlay_attrs()